How to pronounce“stigme”in English

ants, but ants routinely solve very complex problems, like the traveling salesman problem.And finding out how that happens, how they used what's called "stigmergic propagation" to change their environment and basically record onto the real world by laying downpheromones, record what an individual knows so that the other individual agents in that system can find it and react to it, like the neurons in the brain reacting.